a) Coffee or tea comes with dinner.
Answer: Exclusive. One of the hot drinks can be served with dinner.
b) A password must have at least three digits or be at least eight characters long.
Answer: Inclusive. A password can contain both digits and characters.
c) The prerequisite for the course is a course in number theory or a course in cryptography.
Answer: Inclusive. Student willing to take the course has to pass one of them. It is possible that he/she passed both.
d) You can pay using U.S. dollars or Euros.
Answer: Exclusive. Combination of currencies is not acceptable. Customer can pay either using U.S. dollars or Euros